CN110530046A - A kind of Trans-critical cycle CO2The warm and humid adaptive dehumidifying demister system of system and control method - Google Patents
A kind of Trans-critical cycle CO2The warm and humid adaptive dehumidifying demister system of system and control method Download PDFInfo
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- CN110530046A CN110530046A CN201910614988.3A CN201910614988A CN110530046A CN 110530046 A CN110530046 A CN 110530046A CN 201910614988 A CN201910614988 A CN 201910614988A CN 110530046 A CN110530046 A CN 110530046A
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60H—ARRANGEMENTS OF HEATING, COOLING, VENTILATING OR OTHER AIR-TREATING DEVICES SPECIALLY ADAPTED FOR PASSENGER OR GOODS SPACES OF VEHICLES
- B60H1/00—Heating, cooling or ventilating [HVAC] devices
- B60H1/00321—Heat exchangers for air-conditioning devices
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60H—ARRANGEMENTS OF HEATING, COOLING, VENTILATING OR OTHER AIR-TREATING DEVICES SPECIALLY ADAPTED FOR PASSENGER OR GOODS SPACES OF VEHICLES
- B60H1/00—Heating, cooling or ventilating [HVAC] devices
- B60H1/00642—Control systems or circuits; Control members or indication devices for heating, cooling or ventilating devices
- B60H1/00814—Control systems or circuits characterised by their output, for controlling particular components of the heating, cooling or ventilating installation
- B60H1/00878—Control systems or circuits characterised by their output, for controlling particular components of the heating, cooling or ventilating installation the components being temperature regulating devices
- B60H1/00899—Controlling the flow of liquid in a heat pump system
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60H—ARRANGEMENTS OF HEATING, COOLING, VENTILATING OR OTHER AIR-TREATING DEVICES SPECIALLY ADAPTED FOR PASSENGER OR GOODS SPACES OF VEHICLES
- B60H3/00—Other air-treating devices
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60S—SERVICING, CLEANING, REPAIRING, SUPPORTING, LIFTING, OR MANOEUVRING OF VEHICLES, NOT OTHERWISE PROVIDED FOR
- B60S1/00—Cleaning of vehicles
- B60S1/02—Cleaning windscreens, windows or optical devices
- B60S1/56—Cleaning windscreens, windows or optical devices specially adapted for cleaning other parts or devices than front windows or windscreens
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
- F25B—REFRIGERATION MACHINES, PLANTS OR SYSTEMS; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS
- F25B13/00—Compression machines, plants or systems, with reversible cycle
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
- F25B—REFRIGERATION MACHINES, PLANTS OR SYSTEMS; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS
- F25B29/00—Combined heating and refrigeration systems, e.g. operating alternately or simultaneously
- F25B29/003—Combined heating and refrigeration systems, e.g. operating alternately or simultaneously of the compression type system
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
- F25B—REFRIGERATION MACHINES, PLANTS OR SYSTEMS; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS
- F25B39/00—Evaporators; Condensers
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
- F25B—REFRIGERATION MACHINES, PLANTS OR SYSTEMS; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS
- F25B41/00—Fluid-circulation arrangements
- F25B41/20—Disposition of valves, e.g. of on-off valves or flow control valves
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
- F25B—REFRIGERATION MACHINES, PLANTS OR SYSTEMS; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS
- F25B47/00—Arrangements for preventing or removing deposits or corrosion, not provided for in another subclass
- F25B47/02—Defrosting cycles
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
- F25B—REFRIGERATION MACHINES, PLANTS OR SYSTEMS; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS
- F25B49/00—Arrangement or mounting of control or safety devices
- F25B49/02—Arrangement or mounting of control or safety devices for compression type machines, plants or systems
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
- F25B—REFRIGERATION MACHINES, PLANTS OR SYSTEMS; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS
- F25B9/00—Compression machines, plants or systems, in which the refrigerant is air or other gas of low boiling point
- F25B9/002—Compression machines, plants or systems, in which the refrigerant is air or other gas of low boiling point characterised by the refrigerant
- F25B9/008—Compression machines, plants or systems, in which the refrigerant is air or other gas of low boiling point characterised by the refrigerant the refrigerant being carbon dioxide
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- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Physics & Mathematics (AREA)
- Thermal Sciences (AREA)
- General Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Air-Conditioning For Vehicles (AREA)
Abstract
The invention discloses a kind of Trans-critical cycle CO of the present invention2The warm and humid adaptive dehumidifying demister system of system and control method, system include compressor, defrosting heat exchanger, main heat exchanger, electric expansion valve, outdoor heat exchanger, two aperture adjustable valves, an all-pass throttle valve, liquid storage device and two wet-and-dry-bulb thermometers.The present invention cooperates air-conditioning system using degree adjustment valve and all-pass throttle valve, realizes the dehumidification function under heating mode, and be directed to different air humidity contents, proposes three kinds of different dehumanization methods, realizes multi-state Intelligent dehumidifying；Double heat-exchange systems are used in the air-conditioning system of automobile, after being exchanged heat using defrosting heat exchanger and compartment air inlet air, then are passed through windshield and are directly blowed to shield glass, achieve the purpose that windshield demisting.
Description
Technical field
The invention belongs to critical-cross carbon dioxide system regions, in particular to a kind of Trans-critical cycle CO2System is warm and humid adaptive
Dehumidify demister system and control method.
Background technique
New-energy automobile overcomes the fossil fuel dependence problem of fuel-engined vehicle, using energy source diversification, quiet environmental protection, generation
Table future automobile development trend.New-energy automobile is different from fuel-engined vehicle, and at low ambient temperatures, no engine exhaust heat can
It is used in vehicle cabin air, therefore current dew energy automobile winter uses PTC electric heating to heat substantially, however the dew energy
The on-vehicle battery power reservoir capacity of automobile is limited, certainly will will affect the continual mileage of automobile using electric heating heating.Heat pump type air conditioner
The heating efficiency of system operation is 1 or more, and compared with electric heating heating, energy-efficient feature is more advantageous to dew energy vapour
The development of vehicle.The most popular refrigerant of traditional automotive air-conditioning system is R134a, and environmental-protecting performance is poor, is gradually washed in a pan
It eliminates, in the process of moving, environment is changeable for automobile, encounters the weather such as heavy congestion situation, sleet and dense fog, is advised according to road
It is fixed, travel speed need to be reduced as required, and gas cooler air quantity is reduced, and is required air conditioning for automobiles heating performance higher therefore right
For traditional working medium and a very big test, it is difficult to meet actual requirement.And CO2The refrigerant natural as one kind,
It is with the obvious advantage.Trans-critical cycle CO2Heat pump cycle has unique advantage, and exothermic process temperature is higher and sizable there are one
Temperature glide (about 80~100 DEG C).Research shows that: when evaporating temperature is 0 DEG C, water temperature can be heated to 60 DEG C from 0 DEG C, heat
Pump COP can reach 4.3, reduce on 75% than electric heater and gas heater energy consumption.In cold district, conventional air source heat pump
Heating capacity and efficiency with environment temperature reduction decline quickly, the use of heat pump is restricted.And CO2Heat pump system is in low temperature
Higher heating load and very high leaving water temperature can be maintained under environment, greatly save energy spent by ancillary heating equipment.
Again in the process of moving due to automobile, environment is changeable, encounters the weather such as heavy congestion situation, sleet and dense fog,
Therefore new-energy automotive air-conditioning only realize heating, refrigeration two kinds of functions actual requirement is also much not achieved, environment temperature compared with
High or rainy weather, the relative humidity of air greatly increase, and the front windshield of automobile easily hazes in driving conditions, influence
The visual range of driving, greatly reduces drive safety, increases a possibility that traffic accident occurs.
Current existing critical-cross carbon dioxide automotive air-conditioning system, is faced with always under heating mode and cannot achieve dehumidifying
And the problem of direct demisting can not be carried out to front windshield, it is even more impossible to further solve according to actual ambient temperature and air
Humidity reaches the problem of corresponding required moisture removal.
Summary of the invention
The object of the present invention is to provide a kind of Trans-critical cycle CO2The warm and humid adaptive dehumidifying demister system of system and controlling party
Method, to solve the above technical problems.
To achieve the goals above, the present invention adopts the following technical scheme:
A kind of Trans-critical cycle CO2The warm and humid adaptive dehumidifying demister system of system, including compressor, defrosting heat exchanger, four-way change
To valve, outdoor heat exchanger, electric expansion valve, main heat exchanger, the first aperture adjustable valve, the second aperture adjustable valve, all-pass throttle valve
And liquid storage device；
The import of the exhaust outlet connection defrosting heat exchanger of compressor, the d of the outlet connection four-way reversing valve for the heat exchanger that defrosts
Interface, the import of the c interface connection all-pass throttle valve of four-way reversing valve, the outlet of all-pass throttle valve is separately connected the first aperture can
The import of valve, the import of the second aperture adjustable valve are adjusted, the import of the outlet connection main heat exchanger of the first aperture adjustable valve, second opens
The import of the outlet of adjustable valve and the outlet connection electric expansion valve of main heat exchanger is spent, is changed outside the outlet junction chamber of electric expansion valve
The import of hot device, a interface of the outlet connection four-way reversing valve of outdoor heat exchanger, the b interface of four-way reversing valve connect liquid storage device
Import, the air entry of the outlet connect compressor of liquid storage device.
Further, main heat exchanger air inlet is equipped with the first wet-and-dry-bulb thermometer；The air outlet of heat exchanger of defrosting is equipped with the
Two wet-and-dry-bulb thermometers.
Further, the first aperture adjustable valve and the second aperture adjustable valve are used to adjust the flow of refrigerant, all-pass throttling
Valve is used to throttle to refrigerant for the first time.
Further, as absolute moisture content d in ambient outdoor aireWhen < 5g/kg, a kind of transcritical CO_2 system
Warm and humid adaptive dehumidifying demister system work is in pure heating condition defogging mode:
The air door of defrosting heat exchanger is opened, and a, b orifice of four-way reversing valve, c, d orifice, the second aperture is adjustable
Valve completely closes, all-pass full trrottle, the first aperture adjustable valve standard-sized sheet, compressor by the refrigerant compression of low-temp low-pressure to height
After warm high pressure conditions, refrigerant flow direction defrosting heat exchanger then flows to the d interface of four-way reversing valve, from c from defrosting heat exchanger
After interface outflow, main heat exchanger is entered by all-pass throttle valve and the first aperture adjustable valve, after main heat exchanger outflow, by electricity
Sub- expansion valve flows to outdoor heat exchanger after being throttled, then pass through a interface of four-way reversing valve, flow to liquid storage device from b interface, most
The suction end of compressor is returned to eventually；Compartment air inlet first passes through main heat exchanger by after the high temperature refrigerant heating in heat exchanger, then blows
It is further heated to defrosting heat exchanger, finally, part/whole air inlets directly blow to front windshield by the air port of defrosting heat exchanger
Glass carries out heating demisting to it.
Further, as absolute moisture content d in ambient outdoor aireWhen < 5g/kg, a kind of transcritical CO_2 system
Warm and humid adaptive dehumidifying demister system work is in double throttle dehumidifying heating condition defogging mode:
The air door of defrosting heat exchanger and other air doors of automotive air-conditioning system are fully open, a, b interface of four-way reversing valve
Connection, c, d orifice, the first aperture adjustable valve open certain aperture, and the second aperture adjustable valve opens certain aperture, triple valve
Certain aperture is opened, by after the refrigerant compression to high-temperature high-pressure state of low-temp low-pressure, refrigerant flow direction defrosting exchanges heat compressor
Device then flows to the d interface of four-way reversing valve from defrosting heat exchanger, first into all-pass throttle valve after the outflow of c interface
It is divided into two fluids after secondary throttling, wherein flowing to main heat exchanger after a first aperture adjustable valve of entrance, another enters second
Aperture adjustable valve is converged with the refrigerant exported from main heat exchanger after outflow, then flows to electric expansion valve quilt together
Outdoor heat exchanger is flowed to after throttling, is then passed through a interface of four-way reversing valve, is flowed to liquid storage device from b interface, be eventually returned to compress
The suction end of machine；Compartment air inlet first pass through main heat exchanger by heat exchanger high temperature refrigerant heating after, then blow to defrosting heat exchange
Device is further heated, and is heated finally, a part directly blows to front windshield by the air port of defrosting heat exchanger to it
Demisting, another part are blown into compartment by other air outlets of automotive air-conditioning system.
Further, as absolute moisture content d in ambient outdoor aireWhen > 15g/kg, a kind of transcritical CO_2 system
Warm and humid adaptive dehumidifying demister system work is in pure refrigerated dehumidification operating condition defogging mode:
The air door of defrosting heat exchanger is opened, and a, d orifice of four-way reversing valve, b, c orifice, the first aperture is adjustable
Valve fully opens, and the second aperture adjustable valve completely closes, and all-pass throttle valve fully opens, and compressor is by the refrigerant of low-temp low-pressure
After being compressed to high-temperature high-pressure state, refrigerant flow direction defrosting heat exchanger then flows to the d of four-way reversing valve from defrosting heat exchanger
Interface enters after electric expansion valve is throttled into outdoor heat exchanger, after outflow after the outflow of a interface and enters main heat exchanger, and
All-pass throttle valve is flowed to by the first aperture adjustable valve afterwards, then flows to the c interface of four-way reversing valve again, flows to and stores up from b interface
Liquid device is eventually returned to the suction end of compressor, and compartment air inlet first passes through main heat exchanger low temperature dehumidification, then blows to defrosting heat exchanger quilt
Heating, finally, a part, which directly blows to front windshield by the air port of defrosting heat exchanger, carries out heating demisting, another portion to it
Divide and is blown into compartment by other air outlets of automotive air-conditioning system.
A kind of Trans-critical cycle CO2The control method of the warm and humid adaptive dehumidifying demister system of system, comprising:
As absolute moisture content d in ambient outdoor aireWhen < 5g/kg, comprising the following steps: the air door for the heat exchanger that defrosts is beaten
It opens, a, b orifice of four-way reversing valve, c, d orifice, the second aperture adjustable valve completely closes, all-pass full trrottle,
First aperture adjustable valve standard-sized sheet, by after the refrigerant compression to high-temperature high-pressure state of low-temp low-pressure, refrigerant flow direction removes compressor
White heat exchanger then flows to the d interface of four-way reversing valve from defrosting heat exchanger, after the outflow of c interface, passes through all-pass throttle valve
Enter main heat exchanger with the first aperture adjustable valve, after main heat exchanger outflow, is flowed to after electric expansion valve is throttled outdoor
Then heat exchanger passes through a interface of four-way reversing valve, flows to liquid storage device from b interface, be eventually returned to the suction end of compressor；Vehicle
Compartment air inlet first pass through main heat exchanger by heat exchanger high temperature refrigerant heating after, then blow to defrosting heat exchanger further added
Heat, finally, part/whole air inlets directly blow to front windshield by the air port of defrosting heat exchanger and carry out heating demisting to it；
Alternatively, as absolute moisture content d in ambient outdoor aireWhen < 5g/kg, comprising the following steps: defrost heat exchanger
Other of air door and automotive air-conditioning system air door are fully open, a, b orifice of four-way reversing valve, c, d orifice, and first
Aperture adjustable valve opens certain aperture, and the second aperture adjustable valve opens certain aperture, and triple valve opens certain aperture, and compressor will
After the refrigerant compression to high-temperature high-pressure state of low-temp low-pressure, refrigerant flow direction defrosting heat exchanger, then from defrosting heat exchanger
The d interface for flowing to four-way reversing valve, into all-pass throttle valve, is divided into two fluids after the outflow of c interface after being throttled for the first time,
Main heat exchanger wherein is flowed to after a first aperture adjustable valve of entrance, another enters the second aperture adjustable valve, after outflow and comes
The refrigerant of autonomous heat exchanger exit is converged, and is then flowed to after electric expansion valve is throttled together and is flowed to outdoor heat exchanger,
Then a interface for passing through four-way reversing valve, flows to liquid storage device from b interface, is eventually returned to the suction end of compressor；Compartment air inlet is first
It after main heat exchanger is by the high temperature refrigerant heating in heat exchanger, then blows to defrosting heat exchanger and is further heated, finally, one
Part directly blows to front windshield by the air port of defrosting heat exchanger and carries out heating demisting to it, and another part passes through automobile sky
Other air outlets of adjusting system are blown into compartment；
Alternatively, as absolute moisture content d in ambient outdoor aireWhen > 15g/kg, comprising the following steps: defrost heat exchanger
Air door is opened, a, d orifice of four-way reversing valve, b, c orifice, and the first aperture adjustable valve fully opens, the second aperture
Adjustable valve completely closes, and all-pass throttle valve fully opens, and compressor is by the refrigerant compression of low-temp low-pressure to high-temperature high-pressure state
Afterwards, refrigerant flow direction defrosting heat exchanger then flows to the d interface of four-way reversing valve from defrosting heat exchanger, flows out from a interface
Afterwards, enter after electric expansion valve is throttled into outdoor heat exchanger, after outflow and enter main heat exchanger, it then can by the first aperture
It adjusts valve to flow to all-pass throttle valve, then flows to the c interface of four-way reversing valve again, flow to liquid storage device from b interface, be eventually returned to compress
The suction end of machine, compartment air inlet first pass through main heat exchanger low temperature dehumidification, then blow to defrosting heat exchanger and be heated, finally, a part of
Front windshield is directly blowed to by the air port for the heat exchanger that defrosts and carries out heating demisting to it, and another part passes through air conditioning for automobiles system
Other air outlets of system are blown into compartment.
Further, it is equipped with the first wet-and-dry-bulb thermometer, before main heat exchanger for detecting the water capacity d of air inlet aire；
A kind of warm and humid adaptive dehumidifying demister system of transcritical CO_2 system and control method are according to water capacity deSelect corresponding remove
Mist mode；
The second wet-and-dry-bulb thermometer is equipped with after the heat exchanger that defrosts, for detecting the water capacity d of outlet air air, to judge sky
Whether the water capacity d of gas outlet is equal to setting value d0；
Following formula is that the wet and dry bulb temperature of air and the conversion of water capacity calculate:
Wherein: d is water capacity, unit g/kg；
For relative humidity, no unit；
P is air pressure, unit K Pa；
PsFor steam partial pressure, unit K Pa；
Relative humidity in formulaAir pressure P and steam partial pressure PsBy the wet and dry bulb temperature of air, lead to
Air parameter table is crossed to find.
Further, the regulative mode of the first aperture adjustable valve, the second aperture adjustable valve and all-pass throttle valve is that feedback is adjusted
It saves, in ambient outdoor air when absolute moisture content 5g/kg≤d≤15g/kg, corresponding regulative mode is as follows:
Step 1: the initial opening of given first aperture adjustable valve, the second aperture adjustable valve and all-pass throttle valve is respectively
Respectively maximum opening α1max、α2max、α3maxHalf: given aperture is α1=α1max/ 2, α2=α2max/ 2, α3=α3max/2；
Step 2: the registration of the second wet-and-dry-bulb thermometer of observation, is converted into absolute humidity d；
As d > d0When, the preferential aperture α for increasing the first aperture adjustable valve1, it is gradually increased to d=d0Until；If by first
Aperture is adjustable valve opening α1It is adjusted to maximum α1max, still there is d > d0, then start the aperture α for reducing the second aperture adjustable valve2, and
Keep the first aperture adjustable valve opening value α1maxIt is constant, it is gradually decrease to d=d0Until；If the aperture of the second aperture adjustable valve subtracts
As low as minimum value α2min, still there is d > d0, then start the aperture α for reducing all-pass throttle valve3, keep the adjustable valve opening of the first aperture
Value α1maxWith the opening value α of the second aperture adjustable valve2minIt is constant, until d=d0Until；
As d < d0When, the preferential aperture α for reducing the first aperture adjustable valve1, it is gradually decrease to d=d0Until；If by first
Aperture is adjustable, and valve opening is adjusted to minimum of alpha1min, still there is d < d0, then start the aperture α for increasing the second aperture adjustable valve2, and protect
Hold the first aperture adjustable valve opening value α1minIt is constant, it is gradually increased to d=d0Until；If the aperture of the second aperture adjustable valve increases
To maximum value α2max, still there is d < d0, then start the aperture α for increasing all-pass throttle valve3, keep the first aperture adjustable valve opening value
α1minWith the opening value α of the second aperture adjustable valve2maxIt is constant, until d=d0Until.
Further, in the case where moisture removal requires to obtain satisfaction, increase the aperture α of all-pass throttle valve3Use wind-warm syndrome
Degree increases or reduces the aperture α of all-pass throttle valve3Reduce leaving air temp.
Compared with the existing technology, the invention has the following advantages:
A kind of Trans-critical cycle CO of the present invention2The warm and humid adaptive dehumidifying demister system of system and control method, by utilizing aperture
The air-conditioning system of regulating valve and the cooperation of all-pass throttle valve realizes the dehumidification function under heating mode, and is directed to different air
Water capacity proposes three kinds of different dehumanization methods, realizes multi-state Intelligent dehumidifying；It is changed in the air-conditioning system of automobile using double
Hot systems after being exchanged heat using defrosting heat exchanger and compartment air inlet air, then are passed through windshield and directly blow to automotive front baffle
Wind glass achievees the purpose that windshield demisting.
Detailed description of the invention
The accompanying drawings constituting a part of this application is used to provide further understanding of the present invention, and of the invention shows
Examples and descriptions thereof are used to explain the present invention for meaning property, does not constitute improper limitations of the present invention.In the accompanying drawings:
Fig. 1 is a kind of Trans-critical cycle CO of the present invention2The structural schematic diagram of the warm and humid adaptive dehumidifying demister system of system.
Wherein: 1, compressor, 2, defrosting heat exchanger, 3, four-way reversing valve, 4, outdoor heat exchanger, 5, electric expansion valve, 6,
Main heat exchanger, the 7, first aperture adjustable valve, the 8, second aperture adjustable valve, 9, all-pass throttle valve, 10, liquid storage device, the 11, first dry and wet
Globe thermometer, the 12, second wet and dry bulb temperature device.
Fig. 2 is that refrigerant flow adjusts logic chart.
Specific embodiment
The present invention will be described in detail below with reference to the accompanying drawings and embodiments.It should be noted that in the feelings not conflicted
Under condition, the features in the embodiments and the embodiments of the present application be can be combined with each other.
Following detailed description is exemplary explanation, it is intended to provide further be described in detail to the present invention.Unless another
It indicates, all technical terms of the present invention contain with the normally understood of the application one of ordinary skill in the art
Justice is identical.Term used in the present invention is merely to describe specific embodiment, and be not intended to limit according to the present invention
Illustrative embodiments.
Refering to Figure 1, the present invention provides a kind of Trans-critical cycle CO2The warm and humid adaptive dehumidifying demister system of system, including
Compressor 1, defrosting heat exchanger 2, four-way reversing valve 3, outdoor heat exchanger 4, electric expansion valve 5, main heat exchanger 6, the first aperture can
Adjust valve 7, the second aperture adjustable valve 8, all-pass throttle valve 9, liquid storage device 10, the first wet-and-dry-bulb thermometer 11 and the second wet and dry bulb temperature
Meter 12.
The import of the exhaust outlet connection defrosting heat exchanger 2 of compressor 1, the outlet of defrosting heat exchanger 2 connects four-way reversing valve 3
The port d, the entrance of the port the c connection all-pass throttle valve 9 of four-way reversing valve 3, the outlet of all-pass throttle valve 9 connects the first aperture
The entrance of adjustable valve 7 and the second aperture adjustable valve 8, the import of the outlet connection main heat exchanger 6 of the first aperture adjustable valve 7, master change
The entrance of the outlet connection electric expansion valve 5 of the outlet and the second aperture adjustable valve 8 of hot device 6, the outlet connection of electric expansion valve 5
Outdoor heat exchanger 4, the port a of the outlet connection four-way reversing valve 3 of outdoor heat exchanger 4, the port b of four-way reversing valve 3 connects storage
Liquid device 10, the suction end of the outlet connect compressor 1 of liquid storage device 10.First is installed before main heat exchanger 6 (in HVAC wind inlet channel)
The rear side (in HVAC exhaust air flue) of wet-and-dry-bulb thermometer 11, defrosting heat exchanger 2 installs the second wet-and-dry-bulb thermometer 12.
A kind of Trans-critical cycle CO of the present invention2The control method of the warm and humid adaptive dehumidifying demister system of system, including three kinds of differences
New-energy automobile front windshield defrosting function mode under operating condition: 1), as absolute moisture content d in ambient outdoor aire< 5g/
Pure heating condition defogging mode when kg；2), as absolute moisture content 5g/kg≤d in ambient outdoor aireIt is double when≤15g/kg
Throttling dehumidifying heating condition defogging mode；3), as absolute moisture content d in ambient outdoor airePure refrigeration when > 15g/kg is removed
Wet cooling condition defogging mode.
1), as absolute moisture content d in ambient outdoor aireUnder pure heating condition defogging mode when < 5g/kg: this space-time
The water capacity of gas is lower, and environment temperature is generally lower.So there is no need to the air inlets to air conditioning for automobiles to dehumidify, but in order to full
The comfort level requirement of sufficient passenger, the air inlet in compartment need to be heated to comfort temperature.Therefore the multi-state adaptability under this operating condition
The critical-cross carbon dioxide circulatory system for adjusting water capacity is recycled using pure heating, is directly heated to compartment air inlet, then
By different air doors, hot wind a part is blowed to the front windshield of automobile, for windshield demisting or heating compartment
Interior air, another part blow to all directions in compartment, meet passenger's requirement.The dehumidifying demisting side of the circulatory system under the operating condition
Method: the air door of defrosting heat exchanger 2 is opened, for the front windshield blowing demisting to automobile.A, b interface of four-way reversing valve 3
Connection, c, d orifice, the second aperture adjustable valve 8 completely close, 9 standard-sized sheet of all-pass throttle valve, 7 standard-sized sheet of the first aperture adjustable valve,
By after the refrigerant compression to high-temperature high-pressure state of low-temp low-pressure, refrigerant flow direction defrosts heat exchanger 2 compressor 1, then from removing
The d interface that four-way reversing valve 3 is flowed in white heat exchanger 2, it is adjustable by all-pass throttle valve 9 and the first aperture after the outflow of c interface
Valve 7 enters main heat exchanger 6, after the outflow of main heat exchanger 6, flows to outdoor heat exchanger 4 after electric expansion valve 5 is throttled, so
Afterwards by a interface of four-way reversing valve 3, liquid storage device 10 is flowed to from b interface, is eventually returned to the suction end of compressor 1, compartment air inlet
First pass through main heat exchanger 6 by heat exchanger high temperature refrigerant heating after, then blow to defrosting heat exchanger 2 be further heated, most
Afterwards, a part directly blows to front windshield by the air port of defrosting heat exchanger 2 and carries out heating demisting to it, and another part passes through
Other air outlets are blown into compartment.
2), as absolute moisture content 5g/kg≤d in ambient outdoor aireDouble throttle dehumidifying heating condition when≤15g/kg
Under defogging mode: at this point, the water capacity of air is larger, the front windshield in compartment is easier to haze, therefore under the operating condition, needs
It first dehumidifies to the air inlet in compartment, i.e., so that compartment air inlet is exchanged heat with cold fluid, realize the cooling down of air inlet, be precipitated
Excessive moisture reaches effect on moisture extraction.But it is due to water capacity and non-specifically big, so moisture removal does not need too greatly, therefore system
Only need some refrigerant for air dewetting.The temperature of air under the water capacity is corresponding simultaneously is generally less high, therefore vehicle
Compartment air inlet is finally with old needs by the temperature being heated in comfort of passenger claimed range by a small margin.So system is removed at this time
Wet defogging method: the air door of defrosting heat exchanger 2 is opened, other air doors of air-conditioning (HVAC) system are also fully open, four-way commutation
A, b orifice of valve 3, c, d orifice, the first aperture adjustable valve 7 open certain aperture, and the second aperture adjustable valve 8 is opened
Certain aperture, the certain aperture of the opening of triple valve 9.Compressor 1 by after the refrigerant compression to high-temperature high-pressure state of low-temp low-pressure,
Refrigerant flow direction defrosting heat exchanger 2, the d interface of four-way reversing valve 3 is then flowed to from defrosting heat exchanger 2, is flowed out from c interface
Afterwards, into all-pass throttle valve 9, it is divided into two fluids after flowing out after being throttled for the first time, wherein one enters the first aperture adjustable valve 7
After flow to main heat exchanger 6, another enters the second aperture adjustable valve 8, after outflow with the refrigerant that is exported from main heat exchanger 6 into
Row converges, and is then flowed to after electric expansion valve 5 is throttled together and flows to outdoor heat exchanger 4, then passes through a of four-way reversing valve 3
Interface flows to liquid storage device 10 from b interface, is eventually returned to the suction end of compressor 1, and compartment air inlet first passes through the progress of main heat exchanger 6
Low temperature dehumidification, then blow to defrosting heat exchanger 2 and be heated, finally, a part directly blows to front by the air port of defrosting heat exchanger 2
Wind glass carries out heating demisting to it, and another part is blown into compartment by other air outlets.
3), as absolute moisture content d in ambient outdoor aireUnder pure refrigerated dehumidification operating condition defogging mode when > 15g/kg:
The air humidity content of compartment air inlet is excessive, needs bigger moisture removal, corresponding environment temperature is generally higher, therefore system is adopted
With refrigeration cycle, directlys adopt main heat exchanger 2 and progress cooling and dehumidifying is entered the wind to compartment.The dehumidifying defogging method of system at this time: it removes
The air door of white heat exchanger 2 is opened, for realizing the purpose to the front windshield blowing demisting of automobile.A, d of four-way reversing valve 3
Orifice, b, c orifice, the first aperture adjustable valve 7 fully open, and the second aperture adjustable valve 8 completely closes, all-pass throttling
Valve 9 fully opens.By after the refrigerant compression to high-temperature high-pressure state of low-temp low-pressure, refrigerant flow direction defrosting exchanges heat compressor 1
Device 2 then flows to the d interface of four-way reversing valve 3 from defrosting heat exchanger 2, after the outflow of a interface, into outdoor heat exchanger 4,
Enter after electric expansion valve 5 is throttled after outflow and enter main heat exchanger 6, all-pass section is then flowed to by the first aperture adjustable valve 7
Valve 9 is flowed, the c interface of four-way reversing valve 3 is then flowed to again, flows to liquid storage device 10 from b interface, be eventually returned to the air-breathing of compressor 1
End after compartment air inlet first passes through 6 low temperature dehumidification of main heat exchanger, then blows to defrosting heat exchanger 2 and is heated, finally, a part is logical
The air port for crossing defrosting heat exchanger 2 directly blows to front windshield and carries out heating demisting to it, and another part passes through other air outlets
It blows into compartment.
In the HVAC system of new-energy automobile, air inlet only one, air outlet is multiple.It is respectively intended into compartment different
Position be blowed, meet new-energy automobile front windshield demisting, multiple functions such as passenger blows face, blows foot.And compartment
Air inlet first pass through main heat exchanger 6, with blowed to again after refrigerant heat exchanger defrosting heat exchanger 2, vehicle is then blowed to by each air outlet
It is interior.There is first wet-and-dry-bulb thermometer 11 (i.e. before indoor heat exchanger 6), in HVAC air inlet for detecting air inlet air
Water capacity de, to judge the suitable defogging mode of Systematic selection under different air inlets.(the i.e. defrosting heat exchanger at HVAC air outlet
After 2) there is second wet-and-dry-bulb thermometer 12, for detecting the water capacity of outlet air air, to judge that the humidity of air outlet slit is
No to meet dehumidification requirements, i.e. whether outlet air water capacity d is equal to setting value d0(d=d0).The requirement can by new-energy automobile producer or
Person user's sets itself.Following formula is that the wet and dry bulb temperature of air and the conversion of water capacity calculate:
Wherein: d is water capacity, unit g/kg；
For relative humidity, no unit；
P is air pressure, unit K Pa；
PsFor steam partial pressure, unit K Pa；
In formulaRelative humidity, P air pressure and PsSteam partial pressure is led to by the wet and dry bulb temperature of air
Air parameter table is crossed to find.
It joined the first aperture adjustable valve 7, the second aperture adjustable valve 8 and all-pass throttle valve 9 in the present invention.First aperture can
Valve 7 and the second aperture adjustable valve 8 is adjusted to be used to adjust the flow of refrigerant, all-pass throttle valve 9 is used to save refrigerant for the first time
Stream.This is in order to solve the following problems: compressor cannot be switched on again immediately after primary shut down, need for compressor oil return it is pre-
Stay one section of time out.Since in start process, the pressure ratio of carbon dioxide cycle system is very big, the commutation of four-way reversing valve 3 needs
Overcome excessive pressure difference, therefore can not realize commutation in start process, it is necessary in system-down complete commutation, therefore system without
Method is switched between heating mode and dehumidification mode (i.e. mainly for absolute moisture content 5g/kg≤d in ambient outdoor aire
Double throttle dehumidifying heating condition defogging mode when≤15g/kg), therefore three above component is added in the present invention to solve this
Problem.First aperture adjustable valve 7 and the second aperture adjustable valve 8 are mainly used to the size of the moisture removal of regulating system, all-pass throttling
Valve 9 is mainly used to adjust the heating capacity in compartment, auxiliary adjustment moisture removal.
It please refers to shown in Fig. 2, the mediation practices of the first aperture adjustable valve 7, the second aperture adjustable valve 8 and all-pass throttle valve 9
For feedback regulation.Concrete operations logic is as follows: in ambient outdoor air when absolute moisture content 5g/kg≤d≤15g/kg, institute at this time
Corresponding environment temperature is typically in the range of between cold and sweltering heat, and different passengers requires difference for the leaving air temp in compartment,
Therefore the degree that the air inlet under the operating condition is heated is also different, i.e., required heating capacity is different.Therefore at this time in main heat exchanger 6
Refrigerant is low-temperature refrigerant, and air inlet is first carried out cooling and dehumidifying, then blows to defrosting heat exchanger 2 and carry out heating after-blow into compartment.
Corresponding regulative mode is as follows:
Step 1: the aperture of given first aperture adjustable valve 7, the second aperture adjustable valve 8 and all-pass throttle valve 9 is respectively each
From for maximum opening α1max、α2max、α3maxHalf, i.e., given aperture is α1=α1max/ 2, α2=α2max/ 2, α3=α3max/2。
Step 2: the registration of the second wet-and-dry-bulb thermometer 12 of observation, is converted into absolute humidity d；
As d > d0, then illustrate that moisture removal is too small, then preferentially increase the aperture α of the first aperture adjustable valve 71, it is gradually increased to d
=d0Until.If by 7 aperture α of the first aperture adjustable valve1It is adjusted to maximum α1max, still there is d > d0, then start to reduce the second aperture
The aperture α of adjustable valve 82, and keep 7 opening value α of the first aperture adjustable valve1maxIt is constant, it is gradually decrease to d=d0Until.If the
The aperture of two aperture adjustable valves 8 is decreased to minimum value α2min, still there is d > d0, then start the aperture α for reducing all-pass throttle valve 93,
Keep 7 opening value α of the first aperture adjustable valve1maxWith the opening value α of the second aperture adjustable valve 82minIt is constant, until d=d0Until.
By system principle it is found that being bound to by the aperture for adjusting all-pass throttle valve 9 meets moisture removal requirement；
As d < d0, then illustrate that moisture removal is too big, then preferentially reduce the aperture α of the first aperture adjustable valve 71, it is gradually decrease to d
=d0Until.If 7 aperture of the first aperture adjustable valve is adjusted to minimum of alpha1min, still there is d < d0, then starting the second aperture of increase can
Adjust the aperture α of valve 82, and keep 7 opening value α of the first aperture adjustable valve1minIt is constant, it is gradually increased to d=d0Until.If second
The aperture of aperture adjustable valve 8 increases to maximum value α2max, still there is d < d0, then start the aperture α for increasing all-pass throttle valve 93, protect
Hold 7 opening value α of the first aperture adjustable valve1minWith the opening value α of the second aperture adjustable valve 82maxIt is constant, until d=d0Until.By
System principle meets moisture removal requirement it is found that being bound to by the aperture for adjusting all-pass throttle valve 9.
If moisture removal requirement can be met during adjusting the first aperture adjustable valve 7 and the second aperture adjustable valve 8 above,
But environment temperature and not up to passenger's requirement in compartment.I.e. leaving air temp is too low or too high, then can be complete by adjusting
Lead to throttle valve 9 to be adjusted.If compartment air temperature is too low, it can suitably increase the aperture α of all-pass throttle valve 93, instead
If compartment air temperature it is excessively high, can suitably reduce the aperture α of all-pass throttle valve 93。
Electric expansion valve 5 and all-pass throttle valve 9 in system use two-way valve, and system may be implemented and follow in heating and refrigeration
When the switching of ring, the throttling to refrigerant is may be implemented in flowing under opposite operating condition for refrigerant.
As known by the technical knowledge, the present invention can pass through the embodiment party of other essence without departing from its spirit or essential feature
Case is realized.Therefore, embodiment disclosed above, in all respects are merely illustrative, not the only.Institute
Have within the scope of the present invention or is included in the invention in the change being equal in the scope of the present invention.
Claims (10)
1. a kind of Trans-critical cycle CO2The warm and humid adaptive dehumidifying demister system of system, which is characterized in that changed including compressor (1), defrosting
Hot device (2), four-way reversing valve (3), outdoor heat exchanger (4), electric expansion valve (5), main heat exchanger (6), the first aperture adjustable valve
(7), the second aperture adjustable valve (8), all-pass throttle valve (9) and liquid storage device (10)；
The import of exhaust outlet connection defrosting heat exchanger (2) of compressor (1), the outlet connection four-way commutation of defrosting heat exchanger (2)
The d interface of valve (3), the import of c interface connection all-pass throttle valve (9) of four-way reversing valve (3), the outlet of all-pass throttle valve (9)
It is separately connected the import of the first aperture adjustable valve (7), the import of the second aperture adjustable valve (8), the first aperture adjustable valve (7) goes out
The import of mouthful connection main heat exchanger (6), it is swollen that the outlet of the second aperture adjustable valve (8) with the outlet of main heat exchanger (6) connects electronics
The import of swollen valve (5), the import of outlet connection outdoor heat exchanger (4) of electric expansion valve (5), the outlet of outdoor heat exchanger (4)
Connect a interface of four-way reversing valve (3), the import of b interface connection liquid storage device (10) of four-way reversing valve (3), liquid storage device (10)
Outlet connect compressor (1) air entry.
2. a kind of Trans-critical cycle CO according to claim 12The warm and humid adaptive dehumidifying demister system of system, which is characterized in that main
Heat exchanger (6) air inlet is equipped with the first wet-and-dry-bulb thermometer (11)；The air outlet of defrosting heat exchanger (2) is equipped with the second wet and dry bulb temperature
Degree meter (12).
3. a kind of Trans-critical cycle CO according to claim 12The warm and humid adaptive dehumidifying demister system of system, which is characterized in that the
One aperture adjustable valve (7) and the second aperture adjustable valve (8) are used to adjust the flow of refrigerant, and all-pass throttle valve (9) is used to system
Cryogen is throttled for the first time.
4. a kind of Trans-critical cycle CO according to claim 12The warm and humid adaptive dehumidifying demister system of system, which is characterized in that when
Absolute moisture content d in ambient outdoor aireWhen < 5g/kg, a kind of warm and humid adaptive dehumidifying demisting system of transcritical CO_2 system
Work unite in pure heating condition defogging mode:
The air door of defrosting heat exchanger (2) is opened, and a, b orifice of four-way reversing valve (3), c, d orifice, the second aperture can
Valve (8) are adjusted to completely close, all-pass throttle valve (9) standard-sized sheet, first aperture adjustable valve (7) standard-sized sheet, compressor (1) is by low-temp low-pressure
After refrigerant compression to high-temperature high-pressure state, refrigerant flow direction defrosts heat exchanger (2), then the flow direction from defrosting heat exchanger (2)
The d interface of four-way reversing valve (3) enters master by all-pass throttle valve (9) and the first aperture adjustable valve (7) after the outflow of c interface
Heat exchanger (6) flows to outdoor heat exchanger (4) after electric expansion valve (5) is throttled, then after main heat exchanger (6) outflow
By a interface of four-way reversing valve (3), liquid storage device (10) are flowed to from b interface, are eventually returned to the suction end of compressor (1)；Compartment
Air inlet first pass through main heat exchanger (6) by heat exchanger high temperature refrigerant heating after, then blow to defrosting heat exchanger (2) further by
Heating, finally, part/whole air inlets directly blow to front windshield by the air port of defrosting heat exchanger (2) and heat to it
Demisting.
5. a kind of Trans-critical cycle CO according to claim 12The warm and humid adaptive dehumidifying demister system of system, which is characterized in that when
Absolute moisture content d in ambient outdoor aireWhen < 5g/kg, a kind of warm and humid adaptive dehumidifying demisting system of transcritical CO_2 system
Work unite in double throttle dehumidifying heating condition defogging mode:
The air door of defrosting heat exchanger (2) and other air doors of automotive air-conditioning system are fully open, and a, b of four-way reversing valve (3) connect
Mouth connection, c, d orifice, the first aperture adjustable valve (7) open certain aperture, and the second aperture adjustable valve (8) opening is centainly opened
Degree, triple valve (9) open certain aperture, and compressor (1) freezes after the refrigerant compression to high-temperature high-pressure state of low-temp low-pressure
Agent flow direction defrosting heat exchanger (2) then flows to the d interface of four-way reversing valve (3) from defrosting heat exchanger (2), flows out from c interface
Afterwards, into all-pass throttle valve (9), two fluids are divided into after being throttled for the first time, wherein after one enters the first aperture adjustable valve (7)
It flows to main heat exchanger (6), another enters the second aperture adjustable valve (8), the refrigeration exported after outflow and from main heat exchanger (6)
Agent is converged, and is then flowed to after electric expansion valve (5) is throttled together and is flowed to outdoor heat exchanger (4), then changed by four-way
To a interface of valve (3), liquid storage device (10) are flowed to from b interface, are eventually returned to the suction end of compressor (1)；Compartment air inlet first passes through
After main heat exchanger (6) is heated by the high temperature refrigerant in heat exchanger, then blows to defrosting heat exchanger (2) and be further heated, finally,
A part directly blows to front windshield by the air port of defrosting heat exchanger (2) and carries out heating demisting to it, and another part passes through
Other air outlets of automotive air-conditioning system are blown into compartment.
6. a kind of Trans-critical cycle CO according to claim 12The warm and humid adaptive dehumidifying demister system of system, which is characterized in that when
Absolute moisture content d in ambient outdoor aireWhen > 15g/kg, a kind of warm and humid adaptive dehumidifying demisting of transcritical CO_2 system
System works in pure refrigerated dehumidification operating condition defogging mode:
The air door of defrosting heat exchanger (2) is opened, and a, d orifice of four-way reversing valve (3), b, c orifice, the first aperture can
Valve (7) are adjusted to fully open, the second aperture adjustable valve (8) completely closes, and all-pass throttle valve (9) fully opens, and compressor (1) will be low
After the refrigerant compression to high-temperature high-pressure state of warm low pressure, refrigerant flow direction defrosts heat exchanger (2), then from defrosting heat exchanger
(2) the d interface that four-way reversing valve (3) is flowed in, into outdoor heat exchanger (4), enters electronics after the outflow of a interface after outflow
Expansion valve (5) enters main heat exchanger (6) after being throttled, and then flows to all-pass throttle valve (9) by the first aperture adjustable valve (7),
The c interface for then flowing to four-way reversing valve (3) again, flows to liquid storage device (10) from b interface, is eventually returned to the air-breathing of compressor (1)
End, compartment air inlet first pass through main heat exchanger (6) low temperature dehumidification, then blow to defrosting heat exchanger (2) and be heated, finally, a part is logical
The air port for crossing defrosting heat exchanger (2) directly blows to front windshield and carries out heating demisting to it, and another part passes through air conditioning for automobiles
Other air outlets of system are blown into compartment.
7. a kind of Trans-critical cycle CO described in any one of claims 1 to 32The control of the warm and humid adaptive dehumidifying demister system of system
Method characterized by comprising
As absolute moisture content d in ambient outdoor aireWhen < 5g/kg, comprising the following steps: the air door of defrosting heat exchanger (2) is beaten
It opens, a, b orifice of four-way reversing valve (3), c, d orifice, the second aperture adjustable valve (8) completely closes, all-pass throttling
Valve (9) standard-sized sheet, first aperture adjustable valve (7) standard-sized sheet, compressor (1) is by the refrigerant compression of low-temp low-pressure to high-temperature high-pressure state
Afterwards, refrigerant flow direction defrosting heat exchanger (2) then flows to the d interface of four-way reversing valve (3), from c from defrosting heat exchanger (2)
After interface outflow, main heat exchanger (6) are entered by all-pass throttle valve (9) and the first aperture adjustable valve (7), from main heat exchanger (6)
After outflow, outdoor heat exchanger (4) are flowed to after electric expansion valve (5) is throttled, are then connect by a of four-way reversing valve (3)
Mouthful, liquid storage device (10) are flowed to from b interface, are eventually returned to the suction end of compressor (1)；Compartment air inlet first passes through main heat exchanger (6)
By in heat exchanger high temperature refrigerant heating after, then blow to defrosting heat exchanger (2) be further heated, finally, part/all into
Wind directly blows to front windshield by the air port of defrosting heat exchanger (2) and carries out heating demisting to it；
Alternatively, as absolute moisture content d in ambient outdoor aireWhen < 5g/kg, comprising the following steps: the wind of defrosting heat exchanger (2)
Other air doors of door and automotive air-conditioning system are fully open, a, b orifice of four-way reversing valve (3), c, d orifice, the
One aperture adjustable valve (7) opens certain aperture, and the second aperture adjustable valve (8) opens certain aperture, and triple valve (9) opening is centainly opened
Degree, by after the refrigerant compression to high-temperature high-pressure state of low-temp low-pressure, refrigerant flow direction defrosts heat exchanger (2) compressor (1), and
The d interface of four-way reversing valve (3) is flowed to from defrosting heat exchanger (2) afterwards, after the outflow of c interface, into all-pass throttle valve (9),
It is divided into two fluids after being throttled for the first time, wherein flowed to main heat exchanger (6) after a first aperture adjustable valve (7) of entrance, it is another
Branch enters the second aperture adjustable valve (8), is converged after outflow with the refrigerant from main heat exchanger (6) outlet, then together
It flows to after electric expansion valve (5) is throttled and flows to outdoor heat exchanger (4), then pass through a interface of four-way reversing valve (3), connect from b
Mouth flows to liquid storage device (10), is eventually returned to the suction end of compressor (1)；Compartment air inlet first passes through main heat exchanger (6) by heat exchanger
It after interior high temperature refrigerant heating, then blows to defrosting heat exchanger (2) and is further heated, finally, a part passes through defrosting heat exchange
The air port of device (2) directly blows to front windshield and carries out heating demisting to it, and another part passes through other of automotive air-conditioning system
Air outlet is blown into compartment；
Alternatively, as absolute moisture content d in ambient outdoor aireWhen > 15g/kg, comprising the following steps: the wind of defrosting heat exchanger (2)
Door is opened, a, d orifice of four-way reversing valve (3), b, c orifice, and the first aperture adjustable valve (7) fully opens, and second
Aperture adjustable valve (8) completely closes, and all-pass throttle valve (9) fully opens, and compressor (1) arrives the refrigerant compression of low-temp low-pressure
After high-temperature high-pressure state, refrigerant flow direction defrosts heat exchanger (2), then flows to four-way reversing valve (3) from defrosting heat exchanger (2)
D interface, from a interface outflow after, into outdoor heat exchanger (4), after outflow enter electric expansion valve (5) be throttled laggard become owner of
Heat exchanger (6) then flows to all-pass throttle valve (9) by the first aperture adjustable valve (7), then flows to four-way reversing valve (3) again
C interface, flow to liquid storage device (10) from b interface, be eventually returned to the suction end of compressor (1), compartment air inlet first passes through main heat exchange
Device (6) low temperature dehumidification, then blow to defrosting heat exchanger (2) and be heated, finally, a part is straight by the air port of defrosting heat exchanger (2)
It connects and blows to front windshield and carry out heating demisting to it, another part blows into compartment by other air outlets of automotive air-conditioning system
In.
8. control method as claimed in claim 7, which is characterized in that be equipped with the first wet-and-dry-bulb thermometer before main heat exchanger (6)
(11), for detect air inlet air water capacity de；A kind of warm and humid adaptive dehumidifying demister system of transcritical CO_2 system and
Control method is according to water capacity deSelect corresponding defogging mode；
The second wet-and-dry-bulb thermometer (12) are equipped with afterwards in defrosting heat exchanger (2), for detecting the water capacity d of outlet air air, to sentence
Whether the water capacity d of disconnected air outlet slit is equal to setting value d0；
Following formula is that the wet and dry bulb temperature of air and the conversion of water capacity calculate:
Wherein: d is water capacity, unit g/kg；
For relative humidity, no unit；
P is air pressure, unit K Pa；
PsFor steam partial pressure, unit K Pa；
Relative humidity in formulaAir pressure P and steam partial pressure PsBy the wet and dry bulb temperature of air, pass through sky
Gas parameter list is found.
9. control method according to claim 8, which is characterized in that the first aperture adjustable valve (7), the second aperture adjustable valve
(8) and the regulative mode of all-pass throttle valve (9) is feedback regulation, absolute moisture content 5g/kg≤d≤15g/ in ambient outdoor air
When kg, corresponding regulative mode is as follows:
Step 1: the initial opening point of given first aperture adjustable valve (7), the second aperture adjustable valve (8) and all-pass throttle valve (9)
Maximum opening α Wei be respectively1max、α2max、α3maxHalf: given aperture is α1=α1max/ 2, α2=α2max/ 2, α3=α3max/
2；
Step 2: the registration of observation the second wet-and-dry-bulb thermometer (12), is converted into absolute humidity d；
As d > d0When, the preferential aperture α for increasing the first aperture adjustable valve (7)1, it is gradually increased to d=d0Until；If first is opened
Spend adjustable valve (7) aperture α1It is adjusted to maximum α1max, still there is d > d0, then start the aperture α for reducing the second aperture adjustable valve (8)2,
And keep first aperture adjustable valve (7) opening value α1maxIt is constant, it is gradually decrease to d=d0Until；If the second aperture adjustable valve
(8) aperture is decreased to minimum value α2min, still there is d > d0, then start the aperture α for reducing all-pass throttle valve (9)3, keep first
Aperture adjustable valve (7) opening value α1maxWith the opening value α of the second aperture adjustable valve (8)2minIt is constant, until d=d0Until；
As d < d0When, the preferential aperture α for reducing the first aperture adjustable valve (7)1, it is gradually decrease to d=d0Until；If first is opened
Degree adjustable valve (7) aperture is adjusted to minimum of alpha1min, still there is d < d0, then start the aperture α for increasing the second aperture adjustable valve (8)2, and
And keep first aperture adjustable valve (7) opening value α1minIt is constant, it is gradually increased to d=d0Until；If the second aperture adjustable valve (8)
Aperture increase to maximum value α2max, still there is d < d0, then start the aperture α for increasing all-pass throttle valve (9)3, keep first to open
Spend adjustable valve (7) opening value α1minWith the opening value α of the second aperture adjustable valve (8)2maxIt is constant, until d=d0Until.
10. control method according to claim 9, which is characterized in that in the case where moisture removal requires to obtain satisfaction, increase
The aperture α of big all-pass throttle valve (9)3Leaving air temp is set to increase or reduce the aperture α of all-pass throttle valve (9)3Leaving air temp drops
It is low.
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